The FN 509 Compact MRD Compensated pistol in 9mm and flat dark earth (brand part no. 66-101795) packs full-size performance into a compact package using FN’s patented low-profile optics mounting system and a proprietary auto-indexing compensator. FN America / FN Herstal builds the pistol with a 4.2-inch cold hammer forged barrel featuring a recessed target crown, and the compensator reduces muzzle flip by approximately 25%. All-black co-witness iron sights work with more than 10 mountable red dot optics via plate adapters, and fully ambidextrous controls aid manipulation for shooters of either hand. The pistol ships with a 12-round and a 15-round magazine, or two 10-round magazines depending on configuration. Among compensated semi-auto handguns, this 509 Compact MRD Compensated configuration favors shooters who want reduced muzzle flip in a concealable frame.

Key Specifications

• Chambered in 9mm.
• Capacity of 10+1 rounds.
• The barrel measures 4.2 inches, cold hammer forged with a recessed target crown.
• An auto-indexing compensator reduces muzzle flip by approximately 25%.
• The slide uses FN’s Low-Profile Optics Mounting System, compatible with more than 10 red dots.
• The controls are fully ambidextrous, including the slide stop and magazine release.
• The finish is flat dark earth, over a shortened grip for easier concealment.
• Rifled with a 1-in-10-inch twist rate.
• The pistol includes a non-manual safety.
• The slide is optic ready and serrated.
• The action is Striker Fired.

Frequently Asked Questions

What does the compensator do? It’s an auto-indexing design that reduces muzzle flip by approximately 25%.

How many optics does this slide support? More than 10 commercially available red dots via FN’s plate adapter system.

Buy the FN 509 Compact MRD Compensated, FDE

Full-size performance and reduced muzzle flip in a compact, concealable package are exactly what this 509 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.